Configure Background Sync

This policy setting controls when background synchronization occurs while operating in slow-link mode, and applies to any user who logs onto the specified machine while this policy is in effect. To control slow-link mode, use the "Configure slow-link mode" policy setting.

If you enable this policy setting, you can control when Windows synchronizes in the background while operating in slow-link mode. Use the 'Sync Interval' and 'Sync Variance' values to override the default sync interval and variance settings. Use 'Blockout Start Time' and 'Blockout Duration' to set a period of time where background sync is disabled. Use the 'Maximum Allowed Time Without A Sync' value to ensure that all network folders on the machine are synchronized with the server on a regular basis.

You can also configure Background Sync for network shares that are in user selected Work Offline mode. This mode is in effect when a user selects the Work Offline button for a specific share. When selected, all configured settings will apply to shares in user selected Work Offline mode as well.

If you disable or do not configure this policy setting, Windows performs a background sync of offline folders in the slow-link mode at a default interval with the start of the sync varying between 0 and 60 additional minutes. In Windows 7 and Windows Server 2008 R2, the default sync interval is 360 minutes. In Windows 8 and Windows Server 2012, the default sync interval is 120 minutes.

Supported on: At least Windows 7
Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows\NetCache
Value NameBackgroundSyncEnabled
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

Configure background sync:

Sync Interval (minutes)

Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows\NetCache
Value NameBackgroundSyncPeriodMin
Value TypeREG_DWORD
Default Value360
Min Value1
Max Value1440
Sync Variance (minutes)

Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows\NetCache
Value NameBackgroundSyncMaxStartMin
Value TypeREG_DWORD
Default Value60
Min Value0
Max Value3600
Maximum Allowed Time Without A Sync (minutes)

Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows\NetCache
Value NameBackgroundSyncIgnoreBlockOutAfterMin
Value TypeREG_DWORD
Default Value0
Min Value0
Max Value4294967295
Blockout Start Time (HHMM)

Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows\NetCache
Value NameBackgroundSyncBlockOutStartTime
Value TypeREG_DWORD
Default Value0
Min Value0
Max Value2400

HHMM is a value where

HH must be between 0 and 24, and

MM must be between 0 and 59.

Blockout Duration (minutes)

Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows\NetCache
Value NameBackgroundSyncBlockOutDurationMin
Value TypeREG_DWORD
Default Value0
Min Value0
Max Value1440
Enable Background Sync for shares in user selected "Work Offline" mode
Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows\NetCache
Value NameBackgroundSyncEnabledForForcedOffline
Value TypeREG_DWORD
Default Value0
True Value1
False Value0

offlinefiles.admx

Administrative Templates (Computers)

Administrative Templates (Users)